/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: AdaptiveResultTreeImpl.java,v 1.2.4.1 2005/09/06 05:52:18 pvedula Exp $
 */
package com.sun.org.apache.xalan.internal.xsltc.dom;

import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xalan.internal.xsltc.runtime.Hashtable;
import com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary;

import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
import com.sun.org.apache.xml.internal.dtm.DTMAxisTraverser;
import com.sun.org.apache.xml.internal.dtm.DTMWSFilter;
import com.sun.org.apache.xml.internal.utils.XMLString;

import com.sun.org.apache.xml.internal.serializer.SerializationHandler;

import javax.xml.transform.SourceLocator;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;

/**
 * AdaptiveResultTreeImpl is a adaptive DOM model for result tree fragments (RTF). It is
 * used in the case where the RTF is likely to be pure text yet it can still be a DOM tree.
 * It is designed for RTFs which have &lt;xsl:call-template&gt; or &lt;xsl:apply-templates&gt; in
 * the contents. Example:
 * <pre>
 *    &lt;xsl:variable name = "x"&gt;
 *      &lt;xsl:call-template name = "test"&gt;
 *         &lt;xsl:with-param name="a" select="."/&gt;
 *      &lt;/xsl:call-template&gt;
 *    &lt;/xsl:variable>
 * </pre>
 * <p>In this example the result produced by <xsl:call-template> is likely to be a single
 * Text node. But it can also be a DOM tree. This kind of RTF cannot be modelled by
 * SimpleResultTreeImpl.
 * <p>
 * AdaptiveResultTreeImpl can be considered as a smart switcher between SimpleResultTreeImpl
 * and SAXImpl. It treats the RTF as simple Text and uses the SimpleResultTreeImpl model
 * at the beginning. However, if it receives a call which indicates that this is a DOM tree
 * (e.g. startElement), it will automatically transform itself into a wrapper around a
 * SAXImpl. In this way we can have a light-weight model when the result only contains
 * simple text, while at the same time it still works when the RTF is a DOM tree.
 * <p>
 * All methods in this class are overridden to delegate the action to the wrapped SAXImpl object
 * if it is non-null, or delegate the action to the SimpleResultTreeImpl if there is no
 * wrapped SAXImpl.
 * <p>
 * %REVISIT% Can we combine this class with SimpleResultTreeImpl? I think it is possible, but
 * it will make SimpleResultTreeImpl more expensive. I will use two separate classes at
 * this time.
 */
public class AdaptiveResultTreeImpl extends SimpleResultTreeImpl {

  // Document URI index, which increases by 1 at each getDocumentURI() call.
  private static int _documentURIIndex = 0;

  private static final String EMPTY_STRING = "".intern();

  // The SAXImpl object wrapped by this class, if the RTF is a tree.
  private SAXImpl _dom;

  /**
   * The following fields are only used for the nested SAXImpl
   **/

  // The whitespace filter
  private DTMWSFilter _wsfilter;

  // The size of the RTF
  private int _initSize;

  // True if we want to build the ID index table
  private boolean _buildIdIndex;

  // The AttributeList
  private final AttributesImpl _attributes = new AttributesImpl();

  // The element name
  private String _openElementName;


  // Create a AdaptiveResultTreeImpl
  public AdaptiveResultTreeImpl(XSLTCDTMManager dtmManager, int documentID,
      DTMWSFilter wsfilter, int initSize,
      boolean buildIdIndex) {
    super(dtmManager, documentID);

    _wsfilter = wsfilter;
    _initSize = initSize;
    _buildIdIndex = buildIdIndex;
  }

  // Return the DOM object wrapped in this object.
  public DOM getNestedDOM() {
    return _dom;
  }

  // Return the document ID
  public int getDocument() {
    if (_dom != null) {
      return _dom.getDocument();
    } else {
      return super.getDocument();
    }
  }

  // Return the String value of the RTF
  public String getStringValue() {
    if (_dom != null) {
      return _dom.getStringValue();
    } else {
      return super.getStringValue();
    }
  }

  public DTMAxisIterator getIterator() {
    if (_dom != null) {
      return _dom.getIterator();
    } else {
      return super.getIterator();
    }
  }

  public DTMAxisIterator getChildren(final int node) {
    if (_dom != null) {
      return _dom.getChildren(node);
    } else {
      return super.getChildren(node);
    }
  }

  public DTMAxisIterator getTypedChildren(final int type) {
    if (_dom != null) {
      return _dom.getTypedChildren(type);
    } else {
      return super.getTypedChildren(type);
    }
  }

  public DTMAxisIterator getAxisIterator(final int axis) {
    if (_dom != null) {
      return _dom.getAxisIterator(axis);
    } else {
      return super.getAxisIterator(axis);
    }
  }

  public DTMAxisIterator getTypedAxisIterator(final int axis, final int type) {
    if (_dom != null) {
      return _dom.getTypedAxisIterator(axis, type);
    } else {
      return super.getTypedAxisIterator(axis, type);
    }
  }

  public DTMAxisIterator getNthDescendant(int node, int n, boolean includeself) {
    if (_dom != null) {
      return _dom.getNthDescendant(node, n, includeself);
    } else {
      return super.getNthDescendant(node, n, includeself);
    }
  }

  public DTMAxisIterator getNamespaceAxisIterator(final int axis, final int ns) {
    if (_dom != null) {
      return _dom.getNamespaceAxisIterator(axis, ns);
    } else {
      return super.getNamespaceAxisIterator(axis, ns);
    }
  }

  public DTMAxisIterator getNodeValueIterator(DTMAxisIterator iter, int returnType,
      String value, boolean op) {
    if (_dom != null) {
      return _dom.getNodeValueIterator(iter, returnType, value, op);
    } else {
      return super.getNodeValueIterator(iter, returnType, value, op);
    }
  }

  public DTMAxisIterator orderNodes(DTMAxisIterator source, int node) {
    if (_dom != null) {
      return _dom.orderNodes(source, node);
    } else {
      return super.orderNodes(source, node);
    }
  }

  public String getNodeName(final int node) {
    if (_dom != null) {
      return _dom.getNodeName(node);
    } else {
      return super.getNodeName(node);
    }
  }

  public String getNodeNameX(final int node) {
    if (_dom != null) {
      return _dom.getNodeNameX(node);
    } else {
      return super.getNodeNameX(node);
    }
  }

  public String getNamespaceName(final int node) {
    if (_dom != null) {
      return _dom.getNamespaceName(node);
    } else {
      return super.getNamespaceName(node);
    }
  }

  // Return the expanded type id of a given node
  public int getExpandedTypeID(final int nodeHandle) {
    if (_dom != null) {
      return _dom.getExpandedTypeID(nodeHandle);
    } else {
      return super.getExpandedTypeID(nodeHandle);
    }
  }

  public int getNamespaceType(final int node) {
    if (_dom != null) {
      return _dom.getNamespaceType(node);
    } else {
      return super.getNamespaceType(node);
    }
  }

  public int getParent(final int nodeHandle) {
    if (_dom != null) {
      return _dom.getParent(nodeHandle);
    } else {
      return super.getParent(nodeHandle);
    }
  }

  public int getAttributeNode(final int gType, final int element) {
    if (_dom != null) {
      return _dom.getAttributeNode(gType, element);
    } else {
      return super.getAttributeNode(gType, element);
    }
  }

  public String getStringValueX(final int nodeHandle) {
    if (_dom != null) {
      return _dom.getStringValueX(nodeHandle);
    } else {
      return super.getStringValueX(nodeHandle);
    }
  }

  public void copy(final int node, SerializationHandler handler)
      throws TransletException {
    if (_dom != null) {
      _dom.copy(node, handler);
    } else {
      super.copy(node, handler);
    }
  }

  public void copy(DTMAxisIterator nodes, SerializationHandler handler)
      throws TransletException {
    if (_dom != null) {
      _dom.copy(nodes, handler);
    } else {
      super.copy(nodes, handler);
    }
  }

  public String shallowCopy(final int node, SerializationHandler handler)
      throws TransletException {
    if (_dom != null) {
      return _dom.shallowCopy(node, handler);
    } else {
      return super.shallowCopy(node, handler);
    }
  }

  public boolean lessThan(final int node1, final int node2) {
    if (_dom != null) {
      return _dom.lessThan(node1, node2);
    } else {
      return super.lessThan(node1, node2);
    }
  }

  /**
   * Dispatch the character content of a node to an output handler.
   *
   * The escape setting should be taken care of when outputting to
   * a handler.
   */
  public void characters(final int node, SerializationHandler handler)
      throws TransletException {
    if (_dom != null) {
      _dom.characters(node, handler);
    } else {
      super.characters(node, handler);
    }
  }

  public Node makeNode(int index) {
    if (_dom != null) {
      return _dom.makeNode(index);
    } else {
      return super.makeNode(index);
    }
  }

  public Node makeNode(DTMAxisIterator iter) {
    if (_dom != null) {
      return _dom.makeNode(iter);
    } else {
      return super.makeNode(iter);
    }
  }

  public NodeList makeNodeList(int index) {
    if (_dom != null) {
      return _dom.makeNodeList(index);
    } else {
      return super.makeNodeList(index);
    }
  }

  public NodeList makeNodeList(DTMAxisIterator iter) {
    if (_dom != null) {
      return _dom.makeNodeList(iter);
    } else {
      return super.makeNodeList(iter);
    }
  }

  public String getLanguage(int node) {
    if (_dom != null) {
      return _dom.getLanguage(node);
    } else {
      return super.getLanguage(node);
    }
  }

  public int getSize() {
    if (_dom != null) {
      return _dom.getSize();
    } else {
      return super.getSize();
    }
  }

  public String getDocumentURI(int node) {
    if (_dom != null) {
      return _dom.getDocumentURI(node);
    } else {
      return "adaptive_rtf" + _documentURIIndex++;
    }
  }

  public void setFilter(StripFilter filter) {
    if (_dom != null) {
      _dom.setFilter(filter);
    } else {
      super.setFilter(filter);
    }
  }

  public void setupMapping(String[] names, String[] uris, int[] types, String[] namespaces) {
    if (_dom != null) {
      _dom.setupMapping(names, uris, types, namespaces);
    } else {
      super.setupMapping(names, uris, types, namespaces);
    }
  }

  public boolean isElement(final int node) {
    if (_dom != null) {
      return _dom.isElement(node);
    } else {
      return super.isElement(node);
    }
  }

  public boolean isAttribute(final int node) {
    if (_dom != null) {
      return _dom.isAttribute(node);
    } else {
      return super.isAttribute(node);
    }
  }

  public String lookupNamespace(int node, String prefix)
      throws TransletException {
    if (_dom != null) {
      return _dom.lookupNamespace(node, prefix);
    } else {
      return super.lookupNamespace(node, prefix);
    }
  }

  /**
   * Return the node identity from a node handle.
   */
  public final int getNodeIdent(final int nodehandle) {
    if (_dom != null) {
      return _dom.getNodeIdent(nodehandle);
    } else {
      return super.getNodeIdent(nodehandle);
    }
  }

  /**
   * Return the node handle from a node identity.
   */
  public final int getNodeHandle(final int nodeId) {
    if (_dom != null) {
      return _dom.getNodeHandle(nodeId);
    } else {
      return super.getNodeHandle(nodeId);
    }
  }

  public DOM getResultTreeFrag(int initialSize, int rtfType) {
    if (_dom != null) {
      return _dom.getResultTreeFrag(initialSize, rtfType);
    } else {
      return super.getResultTreeFrag(initialSize, rtfType);
    }
  }

  public SerializationHandler getOutputDomBuilder() {
    return this;
  }

  public int getNSType(int node) {
    if (_dom != null) {
      return _dom.getNSType(node);
    } else {
      return super.getNSType(node);
    }
  }

  public String getUnparsedEntityURI(String name) {
    if (_dom != null) {
      return _dom.getUnparsedEntityURI(name);
    } else {
      return super.getUnparsedEntityURI(name);
    }
  }

  public Hashtable getElementsWithIDs() {
    if (_dom != null) {
      return _dom.getElementsWithIDs();
    } else {
      return super.getElementsWithIDs();
    }
  }

  /** Implementation of the SerializationHandler interfaces **/

  /**
   * The code in some of the following interfaces are copied from SAXAdapter.
   **/

  private void maybeEmitStartElement() throws SAXException {
    if (_openElementName != null) {

      int index;
      if ((index = _openElementName.indexOf(":")) < 0) {
        _dom.startElement(null, _openElementName, _openElementName, _attributes);
      } else {
        String uri = _dom.getNamespaceURI(_openElementName.substring(0, index));
        _dom.startElement(uri, _openElementName.substring(index + 1), _openElementName,
            _attributes);
      }

      _openElementName = null;
    }

  }

  // Create and initialize the wrapped SAXImpl object
  private void prepareNewDOM() throws SAXException {
    _dom = (SAXImpl) _dtmManager.getDTM(null, true, _wsfilter,
        true, false, false,
        _initSize, _buildIdIndex);
    _dom.startDocument();
    // Flush pending Text nodes to SAXImpl
    for (int i = 0; i < _size; i++) {
      String str = _textArray[i];
      _dom.characters(str.toCharArray(), 0, str.length());
    }
    _size = 0;
  }

  public void startDocument() throws SAXException {
  }

  public void endDocument() throws SAXException {
    if (_dom != null) {
      _dom.endDocument();
    } else {
      super.endDocument();
    }
  }

  public void characters(String str) throws SAXException {
    if (_dom != null) {
      characters(str.toCharArray(), 0, str.length());
    } else {
      super.characters(str);
    }
  }

  public void characters(char[] ch, int offset, int length)
      throws SAXException {
    if (_dom != null) {
      maybeEmitStartElement();
      _dom.characters(ch, offset, length);
    } else {
      super.characters(ch, offset, length);
    }
  }

  public boolean setEscaping(boolean escape) throws SAXException {
    if (_dom != null) {
      return _dom.setEscaping(escape);
    } else {
      return super.setEscaping(escape);
    }
  }

  public void startElement(String elementName) throws SAXException {
    if (_dom == null) {
      prepareNewDOM();
    }

    maybeEmitStartElement();
    _openElementName = elementName;
    _attributes.clear();
  }

  public void startElement(String uri, String localName, String qName)
      throws SAXException {
    startElement(qName);
  }

  public void startElement(String uri, String localName, String qName, Attributes attributes)
      throws SAXException {
    startElement(qName);
  }

  public void endElement(String elementName) throws SAXException {
    maybeEmitStartElement();
    _dom.endElement(null, null, elementName);
  }

  public void endElement(String uri, String localName, String qName)
      throws SAXException {
    endElement(qName);
  }

  public void addAttribute(String qName, String value) {
    // "prefix:localpart" or "localpart"
    int colonpos = qName.indexOf(":");
    String uri = EMPTY_STRING;
    String localName = qName;
    if (colonpos > 0) {
      String prefix = qName.substring(0, colonpos);
      localName = qName.substring(colonpos + 1);
      uri = _dom.getNamespaceURI(prefix);
    }

    addAttribute(uri, localName, qName, "CDATA", value);
  }

  public void addUniqueAttribute(String qName, String value, int flags)
      throws SAXException {
    addAttribute(qName, value);
  }

  public void addAttribute(String uri, String localName, String qname,
      String type, String value) {
    if (_openElementName != null) {
      _attributes.addAttribute(uri, localName, qname, type, value);
    } else {
      BasisLibrary.runTimeError(BasisLibrary.STRAY_ATTRIBUTE_ERR, qname);
    }
  }

  public void namespaceAfterStartElement(String prefix, String uri)
      throws SAXException {
    if (_dom == null) {
      prepareNewDOM();
    }

    _dom.startPrefixMapping(prefix, uri);
  }

  public void comment(String comment) throws SAXException {
    if (_dom == null) {
      prepareNewDOM();
    }

    maybeEmitStartElement();
    char[] chars = comment.toCharArray();
    _dom.comment(chars, 0, chars.length);
  }

  public void comment(char[] chars, int offset, int length)
      throws SAXException {
    if (_dom == null) {
      prepareNewDOM();
    }

    maybeEmitStartElement();
    _dom.comment(chars, offset, length);
  }

  public void processingInstruction(String target, String data)
      throws SAXException {
    if (_dom == null) {
      prepareNewDOM();
    }

    maybeEmitStartElement();
    _dom.processingInstruction(target, data);
  }

  /**
   * Implementation of the DTM interfaces
   **/

  public void setFeature(String featureId, boolean state) {
    if (_dom != null) {
      _dom.setFeature(featureId, state);
    }
  }

  public void setProperty(String property, Object value) {
    if (_dom != null) {
      _dom.setProperty(property, value);
    }
  }

  public DTMAxisTraverser getAxisTraverser(final int axis) {
    if (_dom != null) {
      return _dom.getAxisTraverser(axis);
    } else {
      return super.getAxisTraverser(axis);
    }
  }

  public boolean hasChildNodes(int nodeHandle) {
    if (_dom != null) {
      return _dom.hasChildNodes(nodeHandle);
    } else {
      return super.hasChildNodes(nodeHandle);
    }
  }

  public int getFirstChild(int nodeHandle) {
    if (_dom != null) {
      return _dom.getFirstChild(nodeHandle);
    } else {
      return super.getFirstChild(nodeHandle);
    }
  }

  public int getLastChild(int nodeHandle) {
    if (_dom != null) {
      return _dom.getLastChild(nodeHandle);
    } else {
      return super.getLastChild(nodeHandle);
    }
  }

  public int getAttributeNode(int elementHandle, String namespaceURI, String name) {
    if (_dom != null) {
      return _dom.getAttributeNode(elementHandle, namespaceURI, name);
    } else {
      return super.getAttributeNode(elementHandle, namespaceURI, name);
    }
  }

  public int getFirstAttribute(int nodeHandle) {
    if (_dom != null) {
      return _dom.getFirstAttribute(nodeHandle);
    } else {
      return super.getFirstAttribute(nodeHandle);
    }
  }

  public int getFirstNamespaceNode(int nodeHandle, boolean inScope) {
    if (_dom != null) {
      return _dom.getFirstNamespaceNode(nodeHandle, inScope);
    } else {
      return super.getFirstNamespaceNode(nodeHandle, inScope);
    }
  }

  public int getNextSibling(int nodeHandle) {
    if (_dom != null) {
      return _dom.getNextSibling(nodeHandle);
    } else {
      return super.getNextSibling(nodeHandle);
    }
  }

  public int getPreviousSibling(int nodeHandle) {
    if (_dom != null) {
      return _dom.getPreviousSibling(nodeHandle);
    } else {
      return super.getPreviousSibling(nodeHandle);
    }
  }

  public int getNextAttribute(int nodeHandle) {
    if (_dom != null) {
      return _dom.getNextAttribute(nodeHandle);
    } else {
      return super.getNextAttribute(nodeHandle);
    }
  }

  public int getNextNamespaceNode(int baseHandle, int namespaceHandle,
      boolean inScope) {
    if (_dom != null) {
      return _dom.getNextNamespaceNode(baseHandle, namespaceHandle, inScope);
    } else {
      return super.getNextNamespaceNode(baseHandle, namespaceHandle, inScope);
    }
  }

  public int getOwnerDocument(int nodeHandle) {
    if (_dom != null) {
      return _dom.getOwnerDocument(nodeHandle);
    } else {
      return super.getOwnerDocument(nodeHandle);
    }
  }

  public int getDocumentRoot(int nodeHandle) {
    if (_dom != null) {
      return _dom.getDocumentRoot(nodeHandle);
    } else {
      return super.getDocumentRoot(nodeHandle);
    }
  }

  public XMLString getStringValue(int nodeHandle) {
    if (_dom != null) {
      return _dom.getStringValue(nodeHandle);
    } else {
      return super.getStringValue(nodeHandle);
    }
  }

  public int getStringValueChunkCount(int nodeHandle) {
    if (_dom != null) {
      return _dom.getStringValueChunkCount(nodeHandle);
    } else {
      return super.getStringValueChunkCount(nodeHandle);
    }
  }

  public char[] getStringValueChunk(int nodeHandle, int chunkIndex,
      int[] startAndLen) {
    if (_dom != null) {
      return _dom.getStringValueChunk(nodeHandle, chunkIndex, startAndLen);
    } else {
      return super.getStringValueChunk(nodeHandle, chunkIndex, startAndLen);
    }
  }

  public int getExpandedTypeID(String namespace, String localName, int type) {
    if (_dom != null) {
      return _dom.getExpandedTypeID(namespace, localName, type);
    } else {
      return super.getExpandedTypeID(namespace, localName, type);
    }
  }

  public String getLocalNameFromExpandedNameID(int ExpandedNameID) {
    if (_dom != null) {
      return _dom.getLocalNameFromExpandedNameID(ExpandedNameID);
    } else {
      return super.getLocalNameFromExpandedNameID(ExpandedNameID);
    }
  }

  public String getNamespaceFromExpandedNameID(int ExpandedNameID) {
    if (_dom != null) {
      return _dom.getNamespaceFromExpandedNameID(ExpandedNameID);
    } else {
      return super.getNamespaceFromExpandedNameID(ExpandedNameID);
    }
  }

  public String getLocalName(int nodeHandle) {
    if (_dom != null) {
      return _dom.getLocalName(nodeHandle);
    } else {
      return super.getLocalName(nodeHandle);
    }
  }

  public String getPrefix(int nodeHandle) {
    if (_dom != null) {
      return _dom.getPrefix(nodeHandle);
    } else {
      return super.getPrefix(nodeHandle);
    }
  }

  public String getNamespaceURI(int nodeHandle) {
    if (_dom != null) {
      return _dom.getNamespaceURI(nodeHandle);
    } else {
      return super.getNamespaceURI(nodeHandle);
    }
  }

  public String getNodeValue(int nodeHandle) {
    if (_dom != null) {
      return _dom.getNodeValue(nodeHandle);
    } else {
      return super.getNodeValue(nodeHandle);
    }
  }

  public short getNodeType(int nodeHandle) {
    if (_dom != null) {
      return _dom.getNodeType(nodeHandle);
    } else {
      return super.getNodeType(nodeHandle);
    }
  }

  public short getLevel(int nodeHandle) {
    if (_dom != null) {
      return _dom.getLevel(nodeHandle);
    } else {
      return super.getLevel(nodeHandle);
    }
  }

  public boolean isSupported(String feature, String version) {
    if (_dom != null) {
      return _dom.isSupported(feature, version);
    } else {
      return super.isSupported(feature, version);
    }
  }

  public String getDocumentBaseURI() {
    if (_dom != null) {
      return _dom.getDocumentBaseURI();
    } else {
      return super.getDocumentBaseURI();
    }
  }

  public void setDocumentBaseURI(String baseURI) {
    if (_dom != null) {
      _dom.setDocumentBaseURI(baseURI);
    } else {
      super.setDocumentBaseURI(baseURI);
    }
  }

  public String getDocumentSystemIdentifier(int nodeHandle) {
    if (_dom != null) {
      return _dom.getDocumentSystemIdentifier(nodeHandle);
    } else {
      return super.getDocumentSystemIdentifier(nodeHandle);
    }
  }

  public String getDocumentEncoding(int nodeHandle) {
    if (_dom != null) {
      return _dom.getDocumentEncoding(nodeHandle);
    } else {
      return super.getDocumentEncoding(nodeHandle);
    }
  }

  public String getDocumentStandalone(int nodeHandle) {
    if (_dom != null) {
      return _dom.getDocumentStandalone(nodeHandle);
    } else {
      return super.getDocumentStandalone(nodeHandle);
    }
  }

  public String getDocumentVersion(int documentHandle) {
    if (_dom != null) {
      return _dom.getDocumentVersion(documentHandle);
    } else {
      return super.getDocumentVersion(documentHandle);
    }
  }

  public boolean getDocumentAllDeclarationsProcessed() {
    if (_dom != null) {
      return _dom.getDocumentAllDeclarationsProcessed();
    } else {
      return super.getDocumentAllDeclarationsProcessed();
    }
  }

  public String getDocumentTypeDeclarationSystemIdentifier() {
    if (_dom != null) {
      return _dom.getDocumentTypeDeclarationSystemIdentifier();
    } else {
      return super.getDocumentTypeDeclarationSystemIdentifier();
    }
  }

  public String getDocumentTypeDeclarationPublicIdentifier() {
    if (_dom != null) {
      return _dom.getDocumentTypeDeclarationPublicIdentifier();
    } else {
      return super.getDocumentTypeDeclarationPublicIdentifier();
    }
  }

  public int getElementById(String elementId) {
    if (_dom != null) {
      return _dom.getElementById(elementId);
    } else {
      return super.getElementById(elementId);
    }
  }

  public boolean supportsPreStripping() {
    if (_dom != null) {
      return _dom.supportsPreStripping();
    } else {
      return super.supportsPreStripping();
    }
  }

  public boolean isNodeAfter(int firstNodeHandle, int secondNodeHandle) {
    if (_dom != null) {
      return _dom.isNodeAfter(firstNodeHandle, secondNodeHandle);
    } else {
      return super.isNodeAfter(firstNodeHandle, secondNodeHandle);
    }
  }

  public boolean isCharacterElementContentWhitespace(int nodeHandle) {
    if (_dom != null) {
      return _dom.isCharacterElementContentWhitespace(nodeHandle);
    } else {
      return super.isCharacterElementContentWhitespace(nodeHandle);
    }
  }

  public boolean isDocumentAllDeclarationsProcessed(int documentHandle) {
    if (_dom != null) {
      return _dom.isDocumentAllDeclarationsProcessed(documentHandle);
    } else {
      return super.isDocumentAllDeclarationsProcessed(documentHandle);
    }
  }

  public boolean isAttributeSpecified(int attributeHandle) {
    if (_dom != null) {
      return _dom.isAttributeSpecified(attributeHandle);
    } else {
      return super.isAttributeSpecified(attributeHandle);
    }
  }

  public void dispatchCharactersEvents(int nodeHandle, org.xml.sax.ContentHandler ch,
      boolean normalize)
      throws org.xml.sax.SAXException {
    if (_dom != null) {
      _dom.dispatchCharactersEvents(nodeHandle, ch, normalize);
    } else {
      super.dispatchCharactersEvents(nodeHandle, ch, normalize);
    }
  }

  public void dispatchToEvents(int nodeHandle, org.xml.sax.ContentHandler ch)
      throws org.xml.sax.SAXException {
    if (_dom != null) {
      _dom.dispatchToEvents(nodeHandle, ch);
    } else {
      super.dispatchToEvents(nodeHandle, ch);
    }
  }

  public org.w3c.dom.Node getNode(int nodeHandle) {
    if (_dom != null) {
      return _dom.getNode(nodeHandle);
    } else {
      return super.getNode(nodeHandle);
    }
  }

  public boolean needsTwoThreads() {
    if (_dom != null) {
      return _dom.needsTwoThreads();
    } else {
      return super.needsTwoThreads();
    }
  }

  public org.xml.sax.ContentHandler getContentHandler() {
    if (_dom != null) {
      return _dom.getContentHandler();
    } else {
      return super.getContentHandler();
    }
  }

  public org.xml.sax.ext.LexicalHandler getLexicalHandler() {
    if (_dom != null) {
      return _dom.getLexicalHandler();
    } else {
      return super.getLexicalHandler();
    }
  }

  public org.xml.sax.EntityResolver getEntityResolver() {
    if (_dom != null) {
      return _dom.getEntityResolver();
    } else {
      return super.getEntityResolver();
    }
  }

  public org.xml.sax.DTDHandler getDTDHandler() {
    if (_dom != null) {
      return _dom.getDTDHandler();
    } else {
      return super.getDTDHandler();
    }
  }

  public org.xml.sax.ErrorHandler getErrorHandler() {
    if (_dom != null) {
      return _dom.getErrorHandler();
    } else {
      return super.getErrorHandler();
    }
  }

  public org.xml.sax.ext.DeclHandler getDeclHandler() {
    if (_dom != null) {
      return _dom.getDeclHandler();
    } else {
      return super.getDeclHandler();
    }
  }

  public void appendChild(int newChild, boolean clone, boolean cloneDepth) {
    if (_dom != null) {
      _dom.appendChild(newChild, clone, cloneDepth);
    } else {
      super.appendChild(newChild, clone, cloneDepth);
    }
  }

  public void appendTextChild(String str) {
    if (_dom != null) {
      _dom.appendTextChild(str);
    } else {
      super.appendTextChild(str);
    }
  }

  public SourceLocator getSourceLocatorFor(int node) {
    if (_dom != null) {
      return _dom.getSourceLocatorFor(node);
    } else {
      return super.getSourceLocatorFor(node);
    }
  }

  public void documentRegistration() {
    if (_dom != null) {
      _dom.documentRegistration();
    } else {
      super.documentRegistration();
    }
  }

  public void documentRelease() {
    if (_dom != null) {
      _dom.documentRelease();
    } else {
      super.documentRelease();
    }
  }

}
